<template>
	<view>
    <!-- <my-search :bgcolor="'pink'" :radius="10"></my-search> -->
    <!-- @myclick="gotoSearch" 自定义 -->
    <my-search @myclick="gotoSearch"></my-search>
		<view class="scroll-view-container">
      <!-- 左侧列表 -->
		  <scroll-view scroll-y="true" class="left-scroll-view" :style="{height:wh + 'px'}">
        <block v-for="(item,i) in cateList" :key='i'>
          <view :class="['left-scroll-view-item',i=== active ? 'active' : '' ]" @click="activeChange(i)">{{item.cat_name}}</view>
        </block>
		  </scroll-view>
		  <!-- 右侧列表 -->
		  <scroll-view scroll-y="true" class="right-scroll-view" :style="{height: wh + 'px'}" :scroll-top="scrollTop" >
		    <view class="cate-lv2" v-for="(item2,i2) in cateLevel2" :key='i2'>
		      <view class="cate-lv2-title">/ {{item2.cat_name}} /</view>
           <!-- 动态获取三级分类 -->
           <view class="cate-lv3-list">
             <view class="cate-lv3-item" v-for="(item3,i3) in item2.children" :key='i3' @click="goToGoodsList(item3)">
               <!-- 图片 -->
               <image :src="item3.cat_icon"></image>
               <!-- 标题 -->
              <text>{{item3.cat_name}}</text>
             </view>
           </view>
		    </view>
		  </scroll-view>
		</view>
	</view>
</template>

<script>
	export default {
		data() {
			return {
        // 可用高度
				wh:0,
        // 分类列表数据
        cateList:[],
        active:0,
        // 二级分类数据
        cateLevel2: [],
        // 重置滚动条的位置
        scrollTop: 0
			}
		},
    onLoad() {
      // 动态计算可用高度
     const sysInfo = uni.getSystemInfoSync()
     console.log(sysInfo)
     this.wh = sysInfo.windowHeight - 50
     this.getCateList()
    },
    methods:{
      // 获取分类数据
     async getCateList() {
       const {data : res } = await uni.$http.get('/api/public/v1/categories')
       console.log(res)
       this.cateList = res.message
       // 获取二级分类的数据
       this.cateLevel2 =res.message[0].children
      },
      // 动态添加active
      activeChange(i) {
        this.active = i
        // 动态计算二级分类数据
        this.cateLevel2 = this.cateList[i].children
        // 重新计算滚动条的位置
        // this.scrollTop = 0
        this.scrollTop = this.scrollTop === 0 ? 1 : 0
      },
      // 非tabbar页面跳转
      goToGoodsList(item3) {
        uni.navigateTo({
          url:'/subpkg/goods_list/goods_list?cid=' + item3.cat_pid
        })
      },
      // 搜索跳转
      gotoSearch() {
        // console.log('ok')
        uni.navigateTo({
          url:'/subpkg/search/search'
        })
      }
    }
	}
</script>

<style lang="scss">
  .scroll-view-container {
    display: flex;
    // 左侧列表
    .left-scroll-view {
      width: 120px;
      .left-scroll-view-item {
        line-height: 60px;
        background-color: #F7F7F7;
        text-align: center;
        font-size: 12px;
        &.active {
          background-color: #FFFFFF;
          position: relative;
          &::before {
            content: '';
            display: block;
            width: 3px;
            height: 30px;
            background-color: #C00000;
            position: absolute;
            top: 50%;
            left: 0;
            transform: translateY(-50%);
          }
        }
      }
    }
    // 右侧列表
    .cate-lv2-title {
      font-size: 12px;
      font-weight: 700;
      text-align: center;
      padding: 15px 0;
    }
    .cate-lv3-list {
      display: flex;
      flex-wrap: wrap;
      .cate-lv3-item {
        width: 33.33%;
        margin-bottom: 10px;
        display: flex;
        flex-direction: column;
        align-items: center;
        image {
          width: 60px;
          height: 60px;
        }
        text {
          font-size: 12px;
        }
      }
    }
  }
</style>
